sohc header question

[dalton]

i just bought a header for my 98 civic ex vtec today at the thompson swap meet. When i got home and looked at the stock manifold, i noticed something plugging into it, possibly an O2 sensor? However, the header that i bought doesnt hav a spot to plug this sensor into. does anyone know what this sensor is and if it is necessary to have plugged into the header?

Here are some pics of it:

[astroboy]

Probably primary O2 sensor. If you look farther down the header you just bought there is most likely a bung. If not you can get a shop to put a bung in (or if you can weld you can put it in yourself).

[jdmdikk]

if the headers u purchased has a bung for the o2 then just place your o2 sensor on it and extend the wires to be able to plug it in..i would just get headers that havea o2 bung were your stock 1 does...if u dont connect the o2 sensor then u will have a check engine light and wont pass emissions

[astroboy]

Also your car will run like sh1t and you will have piss poor fuel economy. You have a pic of the header in question?

[dalton]

thanks guys. think im gonna weld my own bung on it. can i buy one from an auto parts store or should i make my own? also just posted some pics of the header

[H23VTECLUDE]

I'll sell you a NICE Apexi D16 4-1 one piece header for cheaper than you will get that bung & welded on. LMK

[bones4]

word...listen to jdmdikk

[dalton]

I'll sell you a NICE Apexi D16 4-1 one piece header for cheaper than you will get that bung & welded on. LMK

damn yo the bung was $13 and it was basically a round nut. WTF! how much u want bcs i might say fck it and buy urs so i dong hav to drill and weld my header and ill bring back the bung

[H23VTECLUDE]

IDK, I was thinkin like $75 since it is a Name Brand, Good Fitting Header. LMK what you think.

[dalton]

IDK, I was thinkin like $75 since it is a Name Brand, Good Fitting Header. LMK what you think.

sorry man but i just decided to weld the bung to my header since my dad has a welder at his work so he can do it 4 free. thanks anyway and g/l selling ur header.

[dalton]

damn. just realized theres a 2nd o2 sensor right b4 the cat. so i gotta spend another 13bucks and weld on another bung. hope this helps someone else b4 they do the same thing

[astroboy]

I thought there is one that is pre cat and one post cat. Double check because it wouldn't make much sense for 2 O2's before the cat...unless you have 3